<template>
	<div class="login_container">
		<div class="login_img">
			<!-- 头像区域 -->
			<div class="login_box">
				<img src="../assets/logo.png" />
			</div>
			<!-- 登录表单区域 -->
			<el-form ref="login_ref" :rules="loginrules" :model="form" label-width="0px" class="login_input">
				<!-- 用户名 -->
				<!-- prefix-icon="el-icon-search"前面图标
				 suffix-icon="el-icon-date"后面图标
				 -->
				<el-form-item prop="username">
					<el-input v-model="form.username" prefix-icon="iconfont icon-user"></el-input>
				</el-form-item>
				<!-- 密码 -->
				<el-form-item prop="password">
					<el-input type="password" v-model="form.password" prefix-icon="iconfont icon-3702mima"></el-input>
				</el-form-item>
				<!-- 按钮区域 -->
				<el-form-item class="btns">
					<el-button type="primary" @click="sublogin()">登录</el-button>
					<el-button type="info" @click="resetlogin()">重置</el-button>
				</el-form-item>
			</el-form>
		</div>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				//这是登录表单的数据绑定对象
				form: {
					username: 'admin',
					password: '123456'
				},
				loginrules: {
					username: [{
							required: true,/* 必填项 */
							message: '请输入登录名称',/* 错误提示 */
							trigger: 'blur'/* 在失去鼠标焦点时触发 */
						},
						{
							min: 3,
							max: 8,
							message: '长度在 3 到 8 个字符',
							trigger: 'blur'
						}
					],
					password: [{
							required: true,
							message: '请输入登录名称',
							trigger: 'blur'
						},
						{
							min: 6,
							max: 8,
							message: '长度在 6 到 8 个字符',
							trigger: 'blur'
						}
					]
				}
			};
		},
		methods:{
			resetlogin(){
				this.$refs.login_ref.resetFields();
			},
			sublogin(){
				this.$refs.login_ref.validate(async vali=>{
					if(!vali)return;
				const {data:res}=await this.$http.post('login',this.form);
				if(res.meta.status!==200)return this.$message.error('登陆失败！')
				this.$message.success('登录成功');
				//1.将登录成功之后的token，保存到客户端的sessionStorage中
				
				//1.1项目中除了登录之外的其他API接口，必须在登录之后才可以访问
				//1.2token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
				window.sessionStorage.setItem('token',res.data.token);
				//2.通过编程式导航跳转到后台主页，路由也是home
				this.$router.push('/home');
				});
			}
		}
		
	};
</script>

<style lang="less" scoped>
	/* scoped防止组件冲突 */
	.login_container {
		background-color: #2b4b6b;
		height: 100%;
	}

	.login_img {
		width: 450px;
		height: 300px;
		background-color: #fff;
		border-radius: 3px;
		position: absolute;
		left: 50%;
		top: 50%;
		transform: translate(-50%, -50%);

		.login_box {
			height: 130px;
			width: 130px;
			border: 1px solid #eee;
			border-radius: 50%;
			padding: 10px;
			box-shadow: 0 0 10px #ddd;
			position: absolute;
			left: 50%;
			transform: translate(-50%, -50%);
			background-color: white;

			img {
				width: 100%;
				height: 100%;
				border-radius: 50%;
				background-color: #eee;
			}
		}
	}

	.login_input {
		position: absolute;
		bottom: 0;
		width: 100%;
		padding: 0 20px;
		box-sizing: border-box;
	}

	.btns {
		display: flex;
		justify-content: flex-end;
	}
</style>
